Antarchy × Rethoughted Royal Eggs – clean rebuild

3D world model: exact Rethoughted Dragon Egg block model.
2D inventory: Rethoughted Dragon Egg item texture/model.

Prince Egg: Rethoughted black shell recolored with the original Antarchy Prince white palette; purple accents recolored with the original Antarchy Prince gold/yellow palette.
Princess Egg: Rethoughted black shell retained; purple accents recolored with the original Antarchy Princess red palette.
No Antarchy blockstates are overridden.
